diff --git a/module/metric/calc/execution/scale/count_of_dev_task_in_execution.php b/module/metric/calc/execution/scale/count_of_dev_task_in_execution.php
new file mode 100644
index 0000000000..c54c9067ad
--- /dev/null
+++ b/module/metric/calc/execution/scale/count_of_dev_task_in_execution.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * 按执行统计的开发任务数
+ * Scale of dev task in execution.
+ *
+ * 范围：execution
+ * 对象：task
+ * 目的：scale
+ * 度量名称：按执行统计的开发任务数
+ * 单位：count
+ * 描述：按执行统计的开发任务数是指执行中任务类型为开发的任务数求和。该度量项反映了执行中开发的工作量，可以帮助团队进行开发资源调配。
+ * 复用：执行中满足以下条件的任务个数求和，条件是：任务类型为开发，过滤已删除的任务，过滤已删除的执行，过滤已删除的项目。
+ *
+ * @copyright Copyright 2009-2023 禅道软件（青岛）有限公司(ZenTao Software (Qingdao) Co., Ltd. www.zentao.net)
+ * @author    qixinzhi <qixinzhi@zentao.com>
+ * @package
+ * @uses      func
+ * @license   ZPL(https://zpl.pub/page/zplv12.html) or AGPL(https://www.gnu.org/licenses/agpl-3.0.en.html)
+ * @Link      https://www.zentao.net
+ */
+class count_of_dev_task_in_execution extends baseCalc
+{
+    public $dataset = 'getTasks';
+
+    public $fieldList = array('t1.type', 't1.execution');
+
+    public $result = array();
+
+    public function calculate($row)
+    {
+        if($row->type == 'devel')
+        {
+            if(!isset($this->result[$row->execution])) $this->result[$row->execution] = 0;
+            $this->result[$row->execution] ++;
+        }
+    }
+
+    public function getResult($options = array())
+    {
+        $records = $this->getRecords(array('execution', 'value'));
+        return $this->filterByOptions($records, $options);
+    }
+}